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Security Cameras with Audio
Audio surveillance cameras have the capability of recording audio as well as video. All audio cameras have a built-in microphone which is not removable.
A surveillance audio camera with built-in microphone and audio circuit can be used to identify the voice when you cannot figure out the person form the unclear picture. The audio cameras allow you to record clear sound within 5 meters; it is a suitable for driveways, parking lots, halls, warehouses, open office areas. Or even provide powerful evidence for the police to catch the criminals.
Please be aware that not all DVR units have as many audio inputs as there are camera channels. In order to connect an audio camera to a DVR unit, the end user must connect both a video cable and an audio cable from the DVR to each audio camera. Therefore, power + video + audio cables are highly recommended for use CCTV camera with audio.